Latch studs for scaffolds



Oct. 22, 1957 D. 1. wElsz LATCH sTUDs FoR scAFFoDs INVENTOR `'BY WW Unite States Patent O LATCH STUDS FOR SCAFFOLDS Daniel I. Weisz, Ellwood City, Pa., assignor to Beaver Advance Corporation, Ellwood City, Pa., a corporation of Pennsylvania Application August 10, 1955, Serial No. 527,438

1 Claim. (Cl. 304-40) This invention relates to scaffolds and particularly to an improved latch assembly for holding bracing members between vertical uprights.

In all types of scaiolding it is necessary to use diagonal bracing between the vertical members of the scaffold. The practice in pipe and tubular scaffolding has been to bolt the diagonal bracing members to the vertical members either by separate bolts passing through holes in both members or by a stud welded to one member and passing through a hole in the other. In either case a nut had to be removed from the bolt before placing the members together and then replaced after the members were joined. This was a time consuming practice and was plagued by the inevitable loss of some of the separate bolts and nuts. Various means have been proposed to do away with these difliculties but have been in general too slow and cumbersome or too expensive to fabricate and install.

The present invention provides means for overcoming the above mentioned difficulties by simple, inexpensive and rapidly operable means.

It is an object of the present invention to provide a simple and inexpensive latch means for connecting vertical members and bracing members of scaffolding.

Another object of this invention is to provide a unitary positive locking latch means on a vertical scaffold whereby diagonal bracing may be rapidly applied and removed.

A further object of this invention is to provide a latch for a vertical scaffold member having a sliding pin lock mounted on a post transverse to the vertical member and adapted to receive the ends of brace members.

While certain of the objects, advantages and purposes of the present invention are set out above, other objects, advantages and purposes of the invention will be apparent from a consideration of the following description and the accompanying drawings in which:

Figure 1 is an end elevation of a scaffold structure of this invention.

Figure 2 is a side elevation `of the scaffold structure of Figure 1.

Figure 3 is an end elevation, partially cut away, of the scaffold structure of Figure 1.

Figure 4 is a side elevation of a second embodiment of a scatold structure according to this invention.

Figure 5 is an end elevation of the latch pin of Figures 1 and 2.

l 2,810,612 Patented Oct. 22, 1957 ICC Figure 6 is an end elevation of the latch pin of Figure 4.

Referring to the drawings there is illustrated a vertical scaffold member 10 having a hollow horizontal stud 11 extending therefrom. The stud 11 is provided with a horizontal slot 12 in the top surface and an opening 13 in the bottom surface. An elongated latch pin 14 is slidably and pivotally mounted on a transverse pin 15 by means of an elongated slot 16 in the pin. Diagonal braces 17 are provided with flattened ends 18 having openings 19 therein adapted to lit over the horizontal stud 11 on the Vertical members.

The operation of the invention is as follows: The vertical upright members 10 are placed in position in the usual manner with the latch pin 14 extending generally axially of the stud 11, as shown in chain line in Figure 1. The openings in the braces 17 are fitted onto the stud 11, the latch pin 14 is turned on the pin 15 through the slot 12 in the stud 11 to a position transverse to the stud 11, see chain lines in Figure 1. The latch pin is then permitted to slide vertically downwardly on the pin 15 into the opening 13 to lock the braces on the stud 11.

In Figures 4 and 6 there is shown a second embodiment of latch pin 20 which may be substituted for latch pin 14 of the construction shown in Figures l through 3. The latch pin 20 is of at elongated stock having rounded ends and provided with a slot 21 corresponding t-o the slot 16 of the latch pin 14. The latch pin 20 may be used on the transverse pin 15 in post 11 in precisely the same manner as latch 14 (see Figure 4).

While certain preferred embodiments of this invention have been illustrated and described it will be understood that this invention may be otherwise embodied within the scope of the following claim.

I claim:

In a scaffold, a main vertical member, a hollow stud on said main member transverse thereto, said stud having an axially extending slot in the upper side thereof and an opening in the opposite side, an elongated latch pin slidably pivoted in said hollow stud, said pin being movable from an axial position in the stud through the slot to a position transverse to the axis of the stud with a portion extending through the opening in the lower side of the stud and in sliding contact therewith and a diagonal bracing member having an opening adapted to lit over the stud and pin in the axial position and be held in place by rotating the pin from its axial position to its vertical position slidably engaging the opening in the stud.

References Cited in the file of this patent UNITED STATES PATENTS 841,316 Fister Ian. 15, 1907 991,427 Clements May 2, 1911 1,542,468 Mueller June 16, 1925 2,015,376 Brodhead Sept. 24, 1935 2,635,717 Albrecht et al Apr. 21, 1953 2,660,083 Tyson Nov. 24, 1953 FOREIGN PATENTS 330,264 France Aug. 17, 1903 

